src/desktop-events.cpp

   1 #define __SP_DESKTOP_EVENTS_C__
   2
   3 /*
   4  * Event handlers for SPDesktop
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 1999-2002 Lauris Kaplinski
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 # include <config.h>
  16 #endif
  17 #include <map>
  18 #include <string>
  19 #include "display/guideline.h"
  20 #include "display/snap-indicator.h"
  21 #include "helper/unit-menu.h"
  22 #include "helper/units.h"
  23 #include "desktop.h"
  24 #include "document.h"
  25 #include "sp-guide.h"
  26 #include "sp-namedview.h"
  27 #include "desktop-handles.h"
  28 #include "event-context.h"
  29 #include "widgets/desktop-widget.h"
  30 #include "sp-metrics.h"
  31 #include <glibmm/i18n.h>
  32 #include "dialogs/dialog-events.h"
  33 #include "message-context.h"
  34 #include "xml/repr.h"
  35 #include "dialogs/guidelinedialog.h"
  36 #include "snap.h"
  37 #include "display/canvas-grid.h"
  38 #include "display/canvas-axonomgrid.h"
  39 #include "preferences.h"
  40 #include "helper/action.h"
  41 #include "tools-switch.h"
  42 #include <2geom/line.h>
  43
  44 static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
  45 static void init_extended();
  46
  47 /* Root item handler */
  48
  49 int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
  50 {
  51     static bool watch = false;
  52     static bool first = true;
  53
  54     if ( first ) {
  55         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
  56         if ( prefs->getBool("/options/useextinput/value", true)
  57             && prefs->getBool("/options/switchonextinput/value") ) {
  58             watch = true;
  59             init_extended();
  60         }
  61         first = false;
  62     }
  63     if ( watch ) {
  64         snoop_extended(event, desktop);
  65     }
  66
  67     return sp_event_context_root_handler(desktop->event_context, event);
  68 }
  69
  70
  71 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  72 {
  73     static bool dragging = false;
  74     static SPCanvasItem *guide = NULL;
  75     static Geom::Point normal;
  76     int wx, wy;
  77
  78     SPDesktop *desktop = dtw->desktop;
  79     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  80
  81     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  82     Geom::Point const event_win(wx, wy);
  83
  84     gint width, height;
  85     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  86
  87     switch (event->type) {
  88     case GDK_BUTTON_PRESS:
  89             if (event->button.button == 1) {
  90                 dragging = true;
  91                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
  92                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  93                 Geom::Point const event_dt(desktop->w2d(event_w));
  94
  95                 // explicitly show guidelines; if I draw a guide, I want them on
  96                 sp_repr_set_boolean(repr, "showguides", TRUE);
  97                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  98
  99                 // calculate the normal of the guidelines when dragged from the edges of rulers.
 100                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
 101                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 102                 normal_bl_to_tr.normalize();
 103                 normal_tr_to_bl.normalize();
 104                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 105                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 106                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 107                     if (event->button.state & GDK_CONTROL_MASK) {
 108                         // guidelines normal to gridlines
 109                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 110                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 111                     } else {
 112                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 113                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 114                     }
 115                 }
 116                 if (horiz) {
 117                     if (wx < 50) {
 118                         normal = normal_bl_to_tr;
 119                     } else if (wx > width - 50) {
 120                         normal = normal_tr_to_bl;
 121                     } else {
 122                         normal = Geom::Point(0.,1.);
 123                     }
 124                 } else {
 125                     if (wy < 50) {
 126                         normal = normal_bl_to_tr;
 127                     } else if (wy > height - 50) {
 128                         normal = normal_tr_to_bl;
 129                     } else {
 130                         normal = Geom::Point(1.,0.);
 131                     }
 132                 }
 133
 134                 guide = sp_guideline_new(desktop->guides, event_dt, normal);
 135                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 136                 gdk_pointer_grab(widget->window, FALSE,
 137                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 138                                  NULL, NULL,
 139                                  event->button.time);
 140             }
 141             break;
 142     case GDK_MOTION_NOTIFY:
 143             if (dragging) {
 144                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 145                 Geom::Point event_dt(desktop->w2d(event_w));
 146
 147                 SnapManager &m = desktop->namedview->snap_manager;
 148                 m.setup(desktop);
 149                 m.guideSnap(event_dt, normal);
 150
 151                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 152                 desktop->set_coordinate_status(to_2geom(event_dt));
 153                 desktop->setPosition(to_2geom(event_dt));
 154             }
 155             break;
 156     case GDK_BUTTON_RELEASE:
 157             if (dragging && event->button.button == 1) {
 158                 gdk_pointer_ungrab(event->button.time);
 159                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 160                 Geom::Point event_dt(desktop->w2d(event_w));
 161
 162                 SnapManager &m = desktop->namedview->snap_manager;
 163                 m.setup(desktop);
 164                 m.guideSnap(event_dt, normal);
 165
 166                 dragging = false;
 167                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 168                 gtk_object_destroy(GTK_OBJECT(guide));
 169                 guide = NULL;
 170                 if ((horiz ? wy : wx) >= 0) {
 171                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 172                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 173                     sp_repr_set_point(repr, "orientation", normal);
 174                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 175                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 176                     Inkscape::GC::release(repr);
 177                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 178                                      _("Create guide"));
 179                 }
 180                 desktop->set_coordinate_status(from_2geom(event_dt));
 181             }
 182         default:
 183             break;
 184     }
 185
 186     return FALSE;
 187 }
 188
 189 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 190 {
 191     return sp_dt_ruler_event(widget, event, dtw, true);
 192 }
 193
 194 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 195 {
 196     return sp_dt_ruler_event(widget, event, dtw, false);
 197 }
 198
 199 /* Guides */
 200
 201 static Geom::Point drag_origin;
 202
 203 enum SPGuideDragType {
 204     SP_DRAG_TRANSLATE,
 205     SP_DRAG_TRANSLATE_CONSTRAINED,
 206     SP_DRAG_ROTATE,
 207     SP_DRAG_MOVE_ORIGIN,
 208     SP_DRAG_NONE
 209 };
 210
 211 static SPGuideDragType drag_type = SP_DRAG_NONE;
 212
 213 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 214 {
 215     static bool moved = false;
 216     gint ret = FALSE;
 217
 218     SPGuide *guide = SP_GUIDE(data);
 219     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 220
 221     switch (event->type) {
 222         case GDK_2BUTTON_PRESS:
 223             if (event->button.button == 1) {
 224                 drag_type = SP_DRAG_NONE;
 225                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 226                 sp_canvas_item_ungrab(item, event->button.time);
 227                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 228                 ret = TRUE;
 229             }
 230             break;
 231         case GDK_BUTTON_PRESS:
 232             if (event->button.button == 1) {
 233                 if (event->button.state & GDK_CONTROL_MASK) {
 234                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 235                     sp_guide_remove(guide);
 236                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 237                     ret = TRUE;
 238                     break;
 239                 }
 240
 241                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
 242                 double tol = 40.0;
 243                 Geom::Point const event_w(event->button.x, event->button.y);
 244                 Geom::Point const event_dt(desktop->w2d(event_w));
 245                 drag_origin = event_dt;
 246                 if (Geom::L2(guide->point_on_line - event_dt) < tol) {
 247                     // the click was on the guide 'anchor'
 248                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_MOVE_ORIGIN : SP_DRAG_TRANSLATE;
 249                 } else {
 250                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_ROTATE : SP_DRAG_TRANSLATE;
 251                     sp_canvas_item_grab(item,
 252                                         ( GDK_BUTTON_RELEASE_MASK  |
 253                                           GDK_BUTTON_PRESS_MASK    |
 254                                           GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 255                                         NULL,
 256                                         event->button.time);
 257                 }
 258                 ret = TRUE;
 259             }
 260             break;
 261         case GDK_MOTION_NOTIFY:
 262             if (drag_type != SP_DRAG_NONE) {
 263                 Geom::Point const motion_w(event->motion.x,
 264                                            event->motion.y);
 265                 Geom::Point motion_dt(desktop->w2d(motion_w));
 266
 267                 // This is for snapping while dragging existing guidelines. New guidelines,
 268                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 269                 SnapManager &m = desktop->namedview->snap_manager;
 270                 m.setup(desktop);
 271                 m.guideSnap(motion_dt, to_2geom(guide->normal_to_line));
 272
 273                 switch (drag_type) {
 274                     case SP_DRAG_TRANSLATE:
 275                     {
 276                         sp_guide_moveto(*guide, guide->point_on_line + motion_dt - drag_origin, false);
 277                         break;
 278                     }
 279                     case SP_DRAG_TRANSLATE_CONSTRAINED:
 280                     {
 281                         Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, motion_dt);
 282                         sp_guide_moveto(*guide, pt_constr, false);
 283                         break;
 284                     }
 285                     case SP_DRAG_ROTATE:
 286                     {
 287                         double angle = angle_between(drag_origin - guide->point_on_line, motion_dt - guide->point_on_line);
 288                         sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), false);
 289                         break;
 290                     }
 291                     case SP_DRAG_MOVE_ORIGIN:
 292                     {
 293                         Geom::Line line(guide->point_on_line, guide->angle());
 294                         Geom::Coord t = line.nearestPoint(motion_dt);
 295                         sp_guide_moveto(*guide, line.pointAt(t), false);
 296                         break;
 297                     }
 298                     case SP_DRAG_NONE:
 299                         g_assert_not_reached();
 300                         break;
 301                 }
 302                 moved = true;
 303                 desktop->set_coordinate_status(from_2geom(motion_dt));
 304                 desktop->setPosition(from_2geom(motion_dt));
 305
 306                 ret = TRUE;
 307             }
 308             break;
 309     case GDK_BUTTON_RELEASE:
 310             if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
 311                 if (moved) {
 312                     Geom::Point const event_w(event->button.x,
 313                                               event->button.y);
 314                     Geom::Point event_dt(desktop->w2d(event_w));
 315
 316                     SnapManager &m = desktop->namedview->snap_manager;
 317                     m.setup(desktop);
 318                     m.guideSnap(event_dt, guide->normal_to_line);
 319
 320                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 321                         switch (drag_type) {
 322                             case SP_DRAG_TRANSLATE:
 323                             {
 324                                 sp_guide_moveto(*guide, guide->point_on_line + event_dt - drag_origin, true);
 325                                 break;
 326                             }
 327                             case SP_DRAG_TRANSLATE_CONSTRAINED:
 328                             {
 329                                 Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, event_dt);
 330                                 sp_guide_moveto(*guide, pt_constr, true);
 331                                 break;
 332                             }
 333                             case SP_DRAG_ROTATE:
 334                             {
 335                                 double angle = angle_between(drag_origin - guide->point_on_line, event_dt - guide->point_on_line);
 336                                 sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), true);
 337                                 break;
 338                             }
 339                             case SP_DRAG_MOVE_ORIGIN:
 340                             {
 341                                 Geom::Line line(guide->point_on_line, guide->angle());
 342                                 Geom::Coord t = line.nearestPoint(event_dt);
 343                                 sp_guide_moveto(*guide, line.pointAt(t), true);
 344                                 break;
 345                             }
 346                             case SP_DRAG_NONE:
 347                                 g_assert_not_reached();
 348                                 break;
 349                         }
 350                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 351                                          _("Move guide"));
 352                     } else {
 353                         /* Undo movement of any attached shapes. */
 354                         sp_guide_moveto(*guide, guide->point_on_line, false);
 355                         sp_guide_set_normal(*guide, guide->normal_to_line, false);
 356                         sp_guide_remove(guide);
 357                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 358                                      _("Delete guide"));
 359                     }
 360                     moved = false;
 361                     desktop->set_coordinate_status(from_2geom(event_dt));
 362                     desktop->setPosition (from_2geom(event_dt));
 363                 }
 364                 drag_type = SP_DRAG_NONE;
 365                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 366                 sp_canvas_item_ungrab(item, event->button.time);
 367                 ret=TRUE;
 368             }
 369     case GDK_ENTER_NOTIFY:
 370     {
 371             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 372
 373             char *guide_description = sp_guide_description(guide);
 374             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 375             g_free(guide_description);
 376             break;
 377     }
 378     case GDK_LEAVE_NOTIFY:
 379             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 380             desktop->guidesMessageContext()->clear();
 381             break;
 382     default:
 383             break;
 384     }
 385
 386     return ret;
 387 }
 388
 389 //static std::map<GdkInputSource, std::string> switchMap;
 390 static std::map<std::string, int> toolToUse;
 391 static std::string lastName;
 392 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 393
 394 static void init_extended()
 395 {
 396     std::string avoidName = "pad";
 397     GList* devices = gdk_devices_list();
 398     if ( devices ) {
 399         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 400             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 401             if ( dev->name
 402                  && (avoidName != dev->name)
 403                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 404 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 405
 406                 // Set the initial tool for the device
 407                 switch ( dev->source ) {
 408                     case GDK_SOURCE_PEN:
 409                         toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
 410                         break;
 411                     case GDK_SOURCE_ERASER:
 412                         toolToUse[dev->name] = TOOLS_ERASER;
 413                         break;
 414                     case GDK_SOURCE_CURSOR:
 415                         toolToUse[dev->name] = TOOLS_SELECT;
 416                         break;
 417                     default:
 418                         ; // do not add
 419                 }
 420 //            } else if (dev->name) {
 421 //                 g_message("Skippn '%s' as [%s]", dev->name, dev->source);
 422             }
 423         }
 424     }
 425 }
 426
 427
 428 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 429 {
 430     GdkInputSource source = GDK_SOURCE_MOUSE;
 431     std::string name;
 432
 433     switch ( event->type ) {
 434         case GDK_MOTION_NOTIFY:
 435         {
 436             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 437             if ( event2->device ) {
 438                 source = event2->device->source;
 439                 name = event2->device->name;
 440             }
 441         }
 442         break;
 443
 444         case GDK_BUTTON_PRESS:
 445         case GDK_2BUTTON_PRESS:
 446         case GDK_3BUTTON_PRESS:
 447         case GDK_BUTTON_RELEASE:
 448         {
 449             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 450             if ( event2->device ) {
 451                 source = event2->device->source;
 452                 name = event2->device->name;
 453             }
 454         }
 455         break;
 456
 457         case GDK_SCROLL:
 458         {
 459             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 460             if ( event2->device ) {
 461                 source = event2->device->source;
 462                 name = event2->device->name;
 463             }
 464         }
 465         break;
 466
 467         case GDK_PROXIMITY_IN:
 468         case GDK_PROXIMITY_OUT:
 469         {
 470             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 471             if ( event2->device ) {
 472                 source = event2->device->source;
 473                 name = event2->device->name;
 474             }
 475         }
 476         break;
 477
 478         default:
 479             ;
 480     }
 481
 482     if (!name.empty()) {
 483         if ( lastType != source || lastName != name ) {
 484             // The device switched. See if it is one we 'count'
 485             //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
 486             std::map<std::string, int>::iterator it = toolToUse.find(lastName);
 487             if (it != toolToUse.end()) {
 488                 // Save the tool currently selected for next time the input
 489                 // device shows up.
 490                 it->second = tools_active(desktop);
 491             }
 492
 493             it = toolToUse.find(name);
 494             if (it != toolToUse.end() ) {
 495                 tools_switch(desktop, it->second);
 496             }
 497
 498             lastName = name;
 499             lastType = source;
 500         }
 501     }
 502 }
 503
 504
 505
 506 /*
 507   Local Variables:
 508   mode:c++
 509   c-file-style:"stroustrup"
 510   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 511   indent-tabs-mode:nil
 512   fill-column:99
 513   End:
 514 */
 515 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 516